The Microscope

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					The History of the
   Microscope
    History of the Microscope
A long time ago (around the 1st century)
  someone picked up a piece of crystal
  which was thicker in the middle…looked
  through it and discovered it made things
  look LARGER.
       History of the Microscope
   That piece of crystal was called a
    “magnifying glass” and then later was
    called a lens because it was shaped like a
    lentil seed.

                       =
History of the Microscope
                Then, in the 13th
                 century (1200’s) an
                 Italian inventor made
                 the first eye glasses,
                 allowing the wearer
                 to have magnification.
                 His name was Salvino
                 D’Armate. Eye glasses
                 were also called
                 spectacles.
History of the Microscope
                The earliest forms of
                 magnification were
                 magnifying glasses,
                 usually between 6x to
                 10x, and were used for
                 looking at tiny insects.
                 These excited general
                 wonder when used to
                 view fleas or tiny
                 creeping things and so
                 were dubbed "flea
                 glasses."
       History of the Microscope
   In the 1950’s two
    Dutch eye glass
    makers named
    Zacharias Jensen and
    his father Hans,
    started experimenting
    with lenses…
History of the Microscope
                The Jansen’s put
                 several lenses in a
                 tube and made a very
                 important
                 discovery…the object
                 at the end of the tube
                 appeared MUCH
                 larger than when it
                 was under a plain
                 magnifying lens!
       History of the Microscope
   In the late 1600’s,
    Anton Van
    Leeuwenhoek became
    the first person to
    make and use a real
    microscope.
History of the Microscope
             Anton Van Leeuwenhoek
              achieved even greater
              success than his peers by
              making superior lenses. He
              polished & ground up 550
              lenses to make a lens tube
              with a magnification of 270x
              – others were lucky to
              achieve 50x with their
              microscopes!
History of the Microscope
                Anton Van Leeuwenhoek was
                 the first to see bacteria, yeast,
                 and life found in a drop of
                 pond water. He found
                 extraordinary things using his
                 microscope throughout his
                 lifetime.
                Here’s a look at a virtual drop
                 of pond water:

             http://www.microscopy-
                uk.org.uk/index.html?http://w
                ww.microscopy-
                uk.org.uk/ponddip/index.html
History of the Microscope
                An English scientist
                 named Robert Hooke
                 further developed
                 Anton Van
                 Leewenhoek’s work
                 and in 1665 Hooke
                 discovered cells.
History of the Microscope
                Robert Hooke
                 developed a
                 primitive
                 compound
                 microscope
History of the Microscope
                Robert Hooke’s
                 Micrographia was
                 known for stunning
                 illustrations he did
                 himself of the
                 microscopic world.
 History of the Microscope:
Illustrations from Micrographia
History of the Microscope:
 Robert Hooke’s Cork Cells
     History of the Microscope
   Despite these great discoveries,
    microscopes did not change much over
    the next 200 years.
     History of the Microscope
   In the 1850’s a
    German engineer
    named Carl Zeiss
    began making
    adjustments to the
    microscopes he was
    manufacturing,
    making them even
    better.
History of the Microscope
                With the
                 advancement of
                 technology and
                 improved optics,
                 the compound light
                 microscope came
                 into being.
Other types of microscopes:
   Electron Microscopes
               Uses a beam of
                electrons to illuminate
                and magnify a
                specimen
               Very expensive
               Huge
Other types of microscopes:
Electron Microscope Images
Other types of microscopes:
Electron Microscope Images –
      Human Hair 800x
           Think about this…
   Using this powerpoint presentation as an
    example, describe how science and
    technology are interrelated (their
    connection to each other).

   Describe how science and technology are
    part of our society.

				
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posted:2/11/2013
language:simple
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